Door-latch.



E. S. HUBBELL.

DOOR LATCH.

APPLIGATION FILED MAY 16, 1912.

Patented Mar. 11, 1913.

UNTTED TAT EDWARD S. HUBBELL, OF SYRACUSE, NEW YORK.

DOOR-LATCH.

Specification of Letters Patent.

Patented Mar. 11, 1913.

Application filed May 16, 1912. Serial No. 697,672.

To all whom it may concern Be it known that I, EDWARD S. HUBBELL, ofSyracuse, in the county of Onondaga, in the State of New York, haveinvented new and useful Improvements in Door-Latches, of which thefollowing, taken in connection with the accompanying drawings, is afull, clear, and exact description.

This invention relates to door latches and pertains more particularly tothat class of latches constructed with a knob on either side of thedoor.

The object of my invention is to provide means of simple and inexpensiveconstruction whereby the latch may be withdrawn from the adjacent casingand the door opened by simply pushing on one knob orpulling on theother. Heretofore in constructing latches operating in a similar mannerit has been customary to have a spring acting directly on the latch forforcing it back into engagement with the adjacent casing and indirectlyreturning the knob to its normal position. In order to move the knob bymoving the latch it was necessary to employ a very strong spring andeven then the action upon the door spindle was not positive.

A further object, therefore, is to provide positive means for retractingthe knob spindle to its normal position.

Having the above objects and uses in mind, my invention consists in thenew and novel features of construction and operation hereinafterdescribed in connection with the accompanying drawing forming a partthereof, in which- Figure l is a perspective view of a door latch case.Fig. 9. is a cross section on line 22, Fig. 1. Fig. 3 is a cross sectionon line 3-3, Fig. 1. Fig. 4: is a cross section on line 4l4:, Fig. 1.Fig. 5 is a perspective view of one part of the knob spindle showing thewedge-shaped portion on the lower side thereof.

1 is a shell having a removable face plate 2- held in position by screw-3 projecting into the internal threaded proj ection 4.

The plate -5- has an opening therethrough for the latch end -6- onlatch-bolt 7-. The plate -8 has an upright projection -9- having anaperture -10 therethrough for the passage of latch-bolt 7. Upon the endof the latch bolt is fitted a stop -11-. Downward through this stop andthe latch-bolt passes a bolt 19. having a circular washer 13 upon thetop thereof and a nut -14: upon the bottom. Attached to the upper cornerof the shell 1 by means of screw 15 1s a metalplate 16 having anaperture for the passage of a spring rod -17-. This spring rod bearsagainst a projection 18- upon the knob spindle 19. The knob spindle 19is constructed as best shown in Fig. 5 and provided with a projectingportion 20 wedge-shaped upon one side. -2l is a piece of rubber adaptedto contact with the projection 9 and prevent any jar or noise caused bythe meeting of the metal when the knob -22-- is pushed inward. Upon thelatch-bolt 7 is a spring 23 one end resting against the projection -9and the other against the latch end -6-, tending to hold stop ll againstplate 9. The knob spindle -l9- is adapted to fit into the mechanism asbest shown in Fig. 3, having the projecting portion -20 fitting betweenthe upright 9 and the washer 13, the wedge-shaped portion being on theside-toward the washer 13. The other portion 24: of the knob spindle isadapted to receive the extending portion 25 on spindle 19 and to beattached thereby by screw -26.

By pushing knob 22 or pulling on knob 2-ft, the spindle 19- will beforced inwardly against the action of spring 17; the wedge-shapedportion 20- will contact with the washer -13 and the stop 11 will beforced away from the upright 9 and the latch-bolt will be drawn backwardagainst the action of spring 23 until the latch end 6- is withdrawn froma casing not shown and the door will open. Upon releasing the knob,spring 17 will force said knob back to its normal position, washer -13-and stop l1 will be released, spring 23 will force the stop end outwardto the limit of its movement by contact with the upright 9 and againlatch the door.

lVhat I claim is:

1. A door latch comprising a casing having an apertured projectiontherein, a latchbolt in said casing and passing through the aperture inthe projection, a stop upon the end of said bolt, a spindle having awedgeshape portion adapted to fit between said projection and the stopon the bolt, and means tending to hold the spindle in normal. position.

2. A door latch comprising a casing having an apertured projectiontherein, a latchbolt in said casing and passing through the aperture inthe projection a stop upon the end of said bolt, a spindle having aWedgeshape portion adapted to fit between said projection and the stopon the bolt, a projection on said spindle, and a spring mounted in saidcasing and bearing against the projection on the spindle.

3. A door latch comprising a casing having an apertured projectiontherein, a latch bolt passing through the aperture in the projection, astop upon the end of said bolt, a Washer rotatably mounted upon saidstop and a spindle having a Wedge shaped por' tion adapted to fitbetween the projection on the casing and the Washer on the stop.

In Witness whereof I have hereunto set my hand on this 10th day of May1912.

EDWARD S. HUBBELL.

Copies of this patent may be obtained for five cents each, by addressingthe Commissioner of Patents, Washington, D. C.

